Headphone



FIG. 1 is a front elevational view of a headphone;

FIG. 2 is a rear elevational view of a headphone;

FIG. 3 is a top plan view of a headphone, the bottom of the headband is unornamented;

FIG. 4 is a bottom plan view of a headphone;

FIG. 5 is a right side elevational view of a headphone;

FIG. 6 is a left side elevational view of a headphone; and,

FIG. 7 is a perspective view of a headphone, the opposite perspective view is a mirror image. 

We claim the ornamental design for a headphone, as shown and described. 